ENERGY VERSUS STRESS THEORIES FOR COMBINED STRESS--A FATIGUE EXPERIMENT USING A ROTATING DISC. FINAL REPORT ON BASIC RESEARCH ON FATIGUE FAILURES UNDER COMBINED STRESS. Technical Report No. 7
A experiment is described in which the strain energy at the critical location for fatigue failure is maintained constant while the stresses on a given plane of the material at the same location are caused to fluctuate. Apparatus developed to produce this condition consisted of a circular disk with a wide- flanged rim which was loaded along a diameter by means of pivot-pad bearings. The disk was then rotated under a constant load to produce the desired fluctuation in stresses at the center of the disk while maintaining a constant strain energy at the center. The fact that fatigue cracks were developed in the region of constant strain energy was considered to indicate that a concept of a fluctuating strain energy as a basic theory of failure by fatigue under combined stresses is not tenable. (auth)
- Research Organization:
- Brown Univ., Providence. Engineering Materials Research Lab.
- DOE Contract Number:
- DA-19-020-ORD-3520
- NSA Number:
- NSA-13-010145
- OSTI ID:
- 4284853
- Report Number(s):
- EMRL-13; AD-209372
- Resource Relation:
- Other Information: Project No. 5B99-01-004. Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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